Sorry about not enough detail.
I've played in a caster-less party before. If you can optimize it, you can survive to about 10th level without a problem.
The thing is, we can't optimize your character without more details. What are you using to determine stats, what you do you want to cover for your party, and what house rules are in effect? More importantly, you need to find out what level you are starting at, and what books are allowed.
A Dragonfire Bard would work wonders with this party though.
Stats in this group are usually along the lines of 4d6 drop the lowest. Often being able to roll 3 columns and take the best. Bottom line... stat usually are pretty damn good which decreases any MAD issues.
Sources available are pretty much Core, completes, PHB2, ToB, races series would probably also be allowed and others as well.
Given the way this group plays a casterless party would probably actually do pretty well past even 10th level. This is a group that tends to not make much use of power attack or other basic optimizations but still generally fighters tend to rock along well enough. I know, crazy but the dynamic of play style in the group makes such possible. Those that usually play casters do NOT think outside the box and because of that the group tends to think of casters as nothing super special. Again, I know, crazy.
Another possible important piece to this puzzle is that this will be the first time this DM has done so in many years though he has been playing regularly. Basically giving regular DM a break, that being the case I don't want to do anything to overly complicate his job and turn him off to DMing
So party is looking to be melee heavy which will actually work pretty well for this group but lacking in casting and skills utility. So i figured I could try and step into those roles by using a beguiler, even against foes like undead I would be able to help by buffing the very effective ToB types and with illusion battlefield control.
Yeah pfooti healing may become an issue but I figure I could even burn a feat to add some healing to my spell list through Extra Spell. Not overly optimized but in this group probably would be viable and helpful. Probably would try to go UMD route first though.
I guess I could also go the druid route hehe then I could just step in where needed in just about any role.
I think I'm going to start picking the DMs mind a bit to get a better idea of what to expect.